San Antonio Weather in September

During September, San Antonio experiences moderate daytime temperatures of 18°C (64°F) and cooler nights around 8°C (46°F). Some rainfall is typical during this period.

Rainfall in San Antonio in September

Rain is expected on roughly 4 days, totalling around 25 mm (1 in) for the month. The rain this month typically falls in concentrated bursts rather than all-day showers. Expect a few heavier spells rather than constant grey skies.

Temperature in San Antonio in September

September is a excellent month in San Antonio, with 18°C (64°F) during the day and 8°C (46°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 8°C (46°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Wind Speed in San Antonio in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Average water temperature in September

With water temperatures around 10°C (50°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

If your ideal day consists of dry skies and pleasant temperatures, January, February, March, April, September, October, November and December typically offer the best circumstances for San Antonio.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Argentina, check out our San Antonio's climate page.

San Antonio Temperature in September

Min Temperature 8°C (46°F)  

Max Temperature 18°C (64°F)  

Water Temperature 10°C (50°F)  

Chance of Rain 12%  

Precipitation 25 mm (1 in)  

Rainy days 4 days  

Humidity 56%  

Windspeed 4 m/s (8 knots)  

What to Wear in San Antonio in September

For San Antonio in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Some rain is possible, so pack something to handle light showers. The water temperature sits at about 10°C (50°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water.

What To Do in San Antonio in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

6/10

Walking

6/10

Camping

5/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Argentina, check out our San Antonio's climate page.

More climate data for San Antonio

Temperature Rainfall Humidity Wind Speed Water Temp

See the full San Antonio climate overview or explore weather in Argentina.